Batch meter for concrete mixers and the like



c. E. FOOTE. BATCH METER FOR CONCRETE MIXERS AND THE LIKE.

4 SHEETS-SHEET 1.

1,4L19A5L Ewell C. E. FOOTE.

BATCH METER FOR CONCHFTE MIXERS AND THE LIKE.

APPLICATION FILED FEB. n, 1921. 1.541%4531 Patented June 13, 1922.

4 'SHEETSSHEET 2.

MM$M

C. E. FOOTE.

BATCH METER FOR CONCRETE MIXERS AND THE LIKE.

APPLICATION FILED FEB. 8. I92].

Patented June 113, 1922.

4 SHEETS-SHEET 3.

C. E. FOOTE.

BATCP METER FOR CONCRET E MIXERS AND THE LIKE.

APPLICATION FILED FEB. 8. !921.

1 4: 1 9,415 11 Patented June 1922.

4 SHEET- SHELT 4.

unwrap stares eareuroeeice.

CHARLES E. FOOTE, 0F NUNDA, NEW YORK, ASSIGNOR TO THE FOOTE COMPANY, OF

NUNDA, NEW YORK, A CORPORATION OF NEW YCRK.

BATCH METER- FOR CONCRETE MIXERS AND THE LIKE.

Specification of Letters Patent.

Patented June 13, 31922.

/ Application filed February 8, 1921. Serial No. 443,328.

To all whom it may concern:

Be it known that CHARLES E. Foo'rn, a citizen of the United States, residing at Nunda, in the county of Livingston and State of New York, has invented certain new and useful Improvements in Batch Meters for Concrete Mixers and the like, of which the' following is a specification.

My invention relates to a new and useful improvement in batch meters that are used in conjunction with concrete mixers, pavers, etc., and has for an object to provide-a batch meter that may be quickly and readily attached to the machine with which it is to be used one that will be extremely efficient in action and one that will insure that the materials after having been placed withinthe drum will be locked therein for a predetermined number of revolutions of the mixing drum.

It is important in the mixing of good concrete that the aggregates, cement, water, etc., be thoroughly mixed, and if some form of batch meter is not used the amount of time of the mixing of the batches is simply guesswork, and furthermore it is possible for the workman to place the materials in the mixing drum and immediately discharge the same, in this manner saving time, of course, but producing a poorly mixed and often useless concrete.

Another object, therefore, of the present invention is to provide a batch meter that will lock the materials in the drum until the drum has performed a predetermined number of revolutions, which will thereby insure a thorough and uniform mixing; to notify the operator that the number of revolutions has been performed, which in the present instance is by the ringing of abell; and to automatically unlock the discharge apparatus after the predetermined number of revolutions has been made, and to record the number of batches of concrete that are mixed.

Still another object of my invention is to provide a'batch meter that has but a relatively small number of working parts and therefore not apt to get out of order.'

Still another object of my invention is to provide a batch meter wherein after placing a batch of materials in the drum and the same has made a predetermined number of revolutions, a pivotal timing segment will drop by gravity which in turn permits the imlocking of the discharge mechanism of the be placed at different selected points in the timing segment, contacts with a trip arm, which contact will take place after a predetermined number of revolutions of the mixing drum have been. made, when the trip will be lifted by the pin in the timing segment which will allow the timing segment to drop to its normal position, which will permit at the same time the locking mechanism connected with a handle of the discharge apparatus to also assume its normal position thereby permitting the possible manual operation of the discharge handle.

With these and other objects in view which will be pointed out as the specification proceeds, the invention consists in certain new and useful arrangements and combination of parts as will be hereinafter mentioned and more specifically pointed out in the claims.

In the drawings showing the preferred form of batch meter and its mode of attachment to the paver,

Figure 1 is a side elevation showing the different parts of the batch meter in their normal position, the front plate removed from the casing for the sake of clearness;

Fig. 2 is a transverse sectional view of the same and a portion of some of the associated operating gears, certain parts being shown-in elevations;

Fig. 3 is a fragmentary view similar to Fig. 1 but showing the parts after they have been shifted by the raising of the skip;

Fig. 4 is a front view of a portion of the mixer drum showin a part of the locking means for the disc arge handle, and the driving gear and other parts of the batch meter in dotted lines;

Fig. 5 is a side elevation of a portion of the paver showing the mixing drum and'the batch meter attached to the mixer drum, locking means for the discharge handle, in its'locked position, the dotted lines showing the handle-locking means in their shifter or unlocked position;

Fig. 6 is a fragmentary top plan view of a portion of the mixer drum, showing the location of the batch meter and the locking means for holding the discharge handle, the latter being shown in its locked position;

Figs. 7 and 8 are detail views-of the yoke member which holds an intermediate gear that is thrown into and out of engagement with the timing segment;

Figs. 9 and 10 are details of the pawl for operation of the counter; and

Fig. 11 is a fragmentary view showing the trip arm of the batch meter and a portion of the two inner arms or connections of the loading skip as secured to the skip shaft.

In the following descri tion, it is to be understood at the outset t at the operation of the timing segment and the unlocking of the discharge handle after the batch meter has been started is dependent upon a predetermined number of revolutions of the mixing drum after the materials have been placed in the mixing drum.

Furthermore it is to be understood that to clearly illustrate the invention. and its mode of operation and the arrangement of the different parts, I have shown as much of the mixer drum as thought necessary, although the batch meter might be equally well applied to mixer drums of other constructions.

Referring'to the batch meter, per se, as may be clearly seen in Figs. 1 and 5, it comprises a metal casing or box 1 on which there is secured a front plate 2 in which there is formed a window 3 so that the figures of a suitable counter 4 may be visible. In this front plate there is also provided a hinged door 5 which is to be kept locked and only i opened when desired to change the pin in the timing segment, as will be hereinafter mentioned, to regulate the number of revolutions of the mixing drum after the material has been placed therein.

In Fig. 1, the entire front plate has been removed so that the mechanism of the batch meter may be clearly seen and referred to.

Extending within the casing there will be noticed the main operating shaft 6 which is suitably mounted therein and which is provided near one end with a worm 7 while on its opposite end the ear 8 is placed which is designed to always e in mesh with one of the two ring gears 9 which gears are secured on the mixing drum 10.

Referring now to Figs. 4 and 5, which show a portion of the mixer, there will be noticed the two uprights 11 of the main frame of the mixer and the connecting crossbar 12, while the aforementioned mixing drum 10 is provided with the bearing rims 13 near its opposite ends, which in'turn rest on rollers 14, which rollers are suitably mounted on the main frame. 1

For revolving the drum, two intermediate gears 15 are provided which are designed to mesh with the large ring gears 9 which intermediate gears are in turn driven from the pinions 16 which are mounted on the main countershaft 17. Suitable bearings are provided for this countershaft and intermediate gear etc, but further description of the same is-not thought necessary for the purposes of the present invention.

An engine for revolving the drum, is not shown, but it is of course understood that one is provided and is connectedto the main countershaft 17 so that the rotation of this shaft 17 will cause the revolving of the mixing drum through its gears 9.

Referring further to the mixer drums, there is shown in Fig. 4 the handle 18 which causes the discharge chute 19 to, be moved to its discharging position or returned to its normal position, which handle operates the discharge chute through certain racks and gears, but this discharging mechanism excepting the handle, forms no part of the present invention, it being the subject matter of separate application.

For the purpose of the present case the handle 18 and its method of being locked or unlocked from the operation of the batch meter is the only part of the dischargev mechanism that is of importance.

Still referring to Figs. 4 and 5, there is shown the locking rod 20 which is suitably mounted near its outer end on the underside of the cross-beam 12 and is provided with a hook 20 at its one end which is designed. to embrace the handle 18 when in the position shown in Fig. 5, and the opposite end of the rod is pivotally connected to the vertically extending arm 21, which arm is pivoted centrally thereof as at 22 to a bracket 40 (Fig. 5) secured to one of the uprights. The lower end of this arm 21 is pivoted with a pin and slot connection to the sliding bar 24 of the batch meter, which bar and its operations and associated parts will be hereinafter referred to more in detail. I

As far as the description has proceeded, it will be seen that when the sliding bar 24 1s in the position shown in Fig. 1, the vertical upright arm 21 will be drawn in at its lower end which in turn holds the rod 20 outwardly so that the curved hook 20 will not embrace the handle 18 but be out and beyond the same, therefore leaving the handle free to be manually operated. Now if the sliding bar 24, however, be pushed to its other extreme, the upper end of the bar 21 and the rod ,20'will be drawn inwardly, the hook 20 embracing the handle 18' and of course preventing its movement and the discharge of the rotating materials within the drum. 1

Referring now. to the batch meter proper, in the lower lefthand corner of the casing is a segment 25 which will hereinafter be called a.timing segment which segment is pivoted at its upper lefthand corner as at 26, while on its outer periphery or arc there are shown the teeth 27. Also secured to this timing segment is the arcuate plate 28 which is provided with a plurality of openings 29 which are in spaced relation with each other, for the reception of the small pin 30 which is to be placed in any of the openings 29, depending upon the number of revolutions desired for the mixing drum after the insertion of the materials.

It is to be noticed that by pivoting this is designed to be in mesh at all times with the worm 7. Secured centrally of this gear is a small pinion 34. Swing ngly mounted on the shaft 32 as will be seen in Fig. 2 isthe yoke 35, one arm 36 of which is mounted behind the gear 33, while the other arm 37 is supported out beyond the pinion 34.

Referring to the yoke more in detail, as shown in Figs. 7 and 8, it consists of the arms 36 and 37 having the openings 38 in the upper end of both arms for mounting on the aforementioned stubshaft 32, while the one arm 37 is provided with the extra web portion 39 so that a bearing 41 may be formed therein. A small bearing 42 (Fig. 8) is provided and a short axle 43 on which there is to be mounted a small intermediate gear 44,-a portion of the teeth of the gear always meshing with the small aforementioned pinion 34. The axle 43 is a short one so as to not interfere with the larger gear 33. At the lower end of the arm 37 of the yoke and extending into the cross piece is the threaded opening 45 so that a spring46 may be secured to a pin screwed therein.

, It will beseen so far that arevolving of the drum of the mixer and the worth 7 on the shaft 6 will cause the gear 33, the pinion 34 and the gear 44 to revolve at all times, the small intermediate gear 44 however normally being out of engagement with the aforementioned teeth 27 of the timing segment. 25. On swinging the yoke 35 however to the position shown in 3, the teeth of the intermediate gear will be thrown into mesh with the teeth of the timing segment thereby causing the timing segment to elevate orrevolve about its pivotal point in an upwarddirection.

This shifting or swinging of the yoke and its intermediate gear is accomplished by the movement of the sliding, bar 24 which bar will be seen extends entirely across and through the opposite sides of the-casing of the batch meter.

One end of this sliding bar is connected to the upright lever 21 as before mentioned, and its opposite end extends outwardly as at 47 where it is always in contact with the downwardly extending arm 49. This arm 49 is mounted on the meter trip rod 50 which is pivotally secured in the aforementioned bracket 40 and extends downwardly below the sliding bar 24 into the path-of a trip arm' 51 which is mounted on a loader or skip. shaft 52. The skip shaft 52 is mounted in the main frame in suitable bearings and on this skip shaft is secured a skip, not shown, the arms 53 however of the skip are shown rather than illustrating the entire skip, (see Fig. 11).

Referring again to the sliding bar 24 there is shown what might be termed a main spring 54 which is held under tension against a bearing plate 55 and a collar 56, which collar is mounted on the aforementioned sliding bar 24 and secured to the collar is the opposite end of the aforementioned small spring 46.

Near the inner end of the sliding bar 24 there is positioned a trip block 57 which is beveled at its forward end as at 58 and which is riveted or otherwise secured to the sliding bar 24, and directly over this block 57, extending from the rear of the casing is a small bearing 59 provided with a vertical opening 60 therein. A pawl 61 is secured to this hearing, the underface of which pawl is adapted to contact with a small pin 62 which will be noticed is secured in the sliding bar 24 so that the opposite arm 63 of the pawl will be forced downwardly on an inward movement of the sliding bar, this arm 63 in turn being connected by the rod 64 to the actuating arm 65 of the counter 4.

Referring now especially to Figs. 1, 2 and 3, there will be seen the inner trip arm 66 which is pivoted at one end to the aforementioned bearing post 31. Also pivoted to this arm 66 at a short distance from its pivotal 'end just mentioned, is the upright arm 67 the lower end of which extends through the aforementioned opening 60 in the bearing 59 and normally rests on the top surface of the trip block 57 The-inner trip arm 66 is provided with a flanged upper face -68 against which face the pin 3i) placed in the top of the arm, which set screw is designed (Fig. 1) to contact with and raise the arm '70 which operates the clapper 71 of a bell 72 set in the upper lefthand corner of the batch meter casing. The bell and clapper are of such construction that on contact of the set screw 69, when the arm 66 is in its uppermost position, it will force the arm 7 O to a point where the bell clapper is released to strike the gong and on the lowering of the trip arm 66 and the arm 70 of the bell, the clapper will again automatically set so that on the next raising of the arm 70 the gong will again be struck.

When the sliding bar 24 has been pushed inwardly by the arm 49 which will be caused by the elevation of the skip, the upri ht arm 67 by its weight and the weight of t e arm 66, will drop behind the trip block 57 and cause the bar 24 to remain locked in this position until the timing segment 25 has again forced the trip arm 66 and the arm 67 upwardly above the level of the trip block, when .of course the bar 24 will be forced inwardly by the main spring 54.

The operation of the device is as follows: Supposing the mixer to be in operation and the drum 10 to be rotating, then the gear 8 and the worm 7 in the batch meter will be revolving, also the large gear 33, the pinion 34 and the intermediate gear 44 mounted in the yoke will all be in operation.

The parts of the batch meter and the parts associated therewith will be in the position shown in Fig. 1, the discharge handle'18 being without the embrace of the hook 20 of the arm 20. On the elevation of the skip and the revolving of the skip shaft 52, the

trip arm 51 on the skip shaft 52 will force the trip rod 50 inwardly which will in turn cause the arm 49, which is always in contact with the slide bar 24, to force the same inwardly. This will immediately lock the discharge handle 18 through the upright 21 of the rod 20 and hook 20, as shown in Fig. 5. The pin 62 on'the sliding rod 24 strikes the pawl 61 on its. inward movement and has registered the number of the batch. The materials are now in the revolving drum and the handle of the discharge apparatus lockedagainst operation.

The pin 30 will have been previously set in one of the desired openings dependingupon the number of revolutions desired of the mixing drum for each batch. If a greater number of revolutions are desired the pin w1ll be set in one of the openings 29 near the lower end of the plate 28 on the timing segment while if a lesser number are desired, the pin will be set in an opening near the top of the segment. The number of revolutions of the worm 7 and the number ofthe teeth in the gear 33, pinion 34 and gear 44 and teeth 27 of the timing segment is so arranged that the predetermmed number of revolutions can be accurately told by the different heights reached by the timing segment, and the position of the pin 30 be fore it causes the trip arm 66 to trip.-. To go on with the operation, the sliding bar 24 on being forced inwardly not only locks the discharge handle 18 but it has also forced the trip block 57 carried by the sliding bar24 past the upright 67 which is then free to drop behind the same, allowing also the arm 66 which is pivoted thereto to drop to its lowermost position. The main spring 54 has also been compressed. The slide bar 24 is now held against return movement by the arm 67, behind the trip block 57, until released. Furthermore, the inward movement of this sliding bar 24 through the connection of the small spring 46 has swung the yoke 35 so that the intermediate gear 44 is now in mesh with the teeth of the timing segment 25. The revolutions of this intermediate gear 44 will cause the-timing segment to rise as shown in Fig. 3, this figure showing the parts in their operable position. The timing segment will continue to rise, the pin 30 contacting with the flanged face of the arm 66 and raising the arm until the upright 67 is again above the level of the trip block 57, the number of revolutions that it takes to raise this upright depending upon in which hole the pin 30 is set. Supposing the pin was in the upper hole, it would mean there would be ten revolutions before the trip arm 56 would be tripped, or in other words before the timing segment would have risen high enough to cause the arm 67 to be moved above the level of the trip block. If twenty revolutions were desired of the mixing drum after the materials had been inserted, the pin would have been inserted in .the sliding bar 24 outwardly again, allowing the yoke, and the intermediate gear 44 to swing back, the gear out of mesh with the timin segment, so. that the timing segment 25 wil again drop to its normal position. The set screw 69 in the arm 66 will have pushed the arm 70 connected with the bell clapper to its uppermost position, which will in turn have caused the bell to be rung at the completion of the number of revolutions and at the instant the trip 66 is'released. The sliding rod 24- has now returned to its normal position, the timing se ment has dropped to its normal position, an the intermediate gear in the swinging yoke swung back and remaining out of mesh until the sliding bar is again forced inwardly by the elevation of the skip.

From the foregoing it will be seen that the o eration of the batch meter is relatively simp e and very accurate, the sliding bar 24 being simply forced inwardly on the elevating or the skipwhich inward movement of the bar locks the discharge handle of the paver, while the bars return movement unlocks the handle so that the materials may be free to be discharged, when all parts are again in their position for another cycle.

The return of the sliding bar is accomplished by one'spring after the inner trip 67 has been so elevated by the timing segment that the sliding bar is free to be forced to its normal position. The return of the sliding bar is always assured as the trip is bound to be operated by the raising of the timing segment after the intermediate gear has been thrown into mesh therewith.

The batch meter is one that is controlled by a predetermined number of revolutions of the mixing drum rather than by the actual time of the material in the mixing drum, and therefore is very accurate as regardless of how fast or slow the drum may be revolving the material will remain in the drum for the predetermined number of revolutions. Furthermore, from the foregoing it will be seen that immediately upon the dumping of the materials into the revolving drum, the batch meter will be set in operation, the number of. the batch registered, the material remained locked against discharge in the revolving drum for a predetermined number of revolutions, after which number the operator will be signalled by the striking of the bell, and the discharge handle then automatically unlocked so that it may be manually operated. and the perfectly mixed concrete poured from the drum. I

The batch meter has proved very eflicient in operation and is one that may be readily attached to the mixer drum or quickly removed if desired. o 1

Many slight changes might be made in the construction of the batch meter and the arrangement of the different parts without in any way departing from the spirit oi scope of the invention.

claim as new and desire to claim by Letters Patent is 1. A batch meter for concrete mixers comprising a casing,a worm shaft in said casing and adapted to be driven from the drum of the mixer, a slidable bar, a trip mechanism set by said slidable bar, atiming segment pivotally mounted in said casing, means driven by said worm and swung into en gagement with said timing segment when said bar is forced inwardly, said trip mechanism and said slidablebar released by said timing segment after said worm shaft has made a redetermined number of revolutions, an means for returning the slidable bar to its normal position.

2. In combination with a concrete mixer having a discharging means, a batchmeter comprising a cas1ng,a continuously revolving Worm shaft. therein operated from the drum of the mixer, timing means in said mixer, a slidable bar extending through said casing, a handle for the discharging means, means connected with the discharging handle and with said slidable bar for locking the discharge handle when said slidable bar is operated, swinging means pivoted at their outer point and disposed between said worm shaft and connected with said slidable bar wherein when said -sli,dable bar is initially operated said handlenf the locking means will be held in a locked position until a predetermined number of revolutions of the mixer has been made and said locking means then released by said tripping means.

3. In combination with a concrete mixer having a discharging means and a handle therefor, a batch meter comprising a casing, a shaft in said casing and driven by the drum of the mixer, a slidable bar extending through said casing and means secured to one end of said bar and secured to the handle of the discharging means, a trip located opposite the bar at its other end and adapted to operate the slidable bar by the elevation its return.

4. In combination with a concrete mixer having a discharging means and a handle, a

batch meter comprising a casing, a worm shaft in sald casing, a gear 1n mesh wlth said worm and a pinion in fixed relation Having thus described the same, what I termediate gear from engagement with said timing segment after a predetermined number of revolutions of the drum of the mixei and to permit said slidable bar to return to its normal position to thereby unlock the discharge handle of the mixer,

5. In combination with a concrete mixer havin loading and discharging means, and a handle connected with said mea a batch meter comprising a a drive shaft in said casing, a gear driven by said shaft, a swinging yoke member having a gear mounted therein and driven by said first mentioned gear, a timing segment pivotally mounted in said casing and to be elevated on contact with a gear mounted in said yoke member, a slidable bar extending through the sides of said casing, a spring on said bar for holding said bar in its normal position, a trip block mounted on said bar, a trip mechanism cooperatingwith said trip block for locking said slide ba-r when initially moved by the elevation of said loading means,

means connected with said slidable bar and.

with said yoke member for forcing the gear in said yoke member in mesh with said timing segment when said slidable bar is initially operated and said timing segment tripping said trip mechanism after said drive shaft and the drum of the mixer has made a predetermined number of revolutions and thereby permit said slidable bar to be forced back to its normal position.

6. In combination with a concrete mixer having a charging and discharging means,v

a batch meter comprising a casing, a drive shaft in said casing, a gear and pinion driven by said shaft, a swinging yoke member having a gear mounted therein and driven-by said pinion, a timing segment pivotally mounted'in said casing and raised on contact with the gear in said yoke member, a slidable bar for locking the discharge means of the mixer, said slidable bar extending through the sides of said casing, a spring on said bar for holding the bar in its normal position, a trip block mounted onsaid bar and a trip mechanism cooperating with said block for retaining said slide bar when initially moved and locking said discharge means, means connected with said slidable bar and with said yoke member fon forcing the gear in said yoke into mesh with said timing segment when said slidable bar is initially moved and which initial movement locks said discharge means, and said timing segment releasing said trip mechanism after the drumand drlve shaft have made a predetermined number of revolutions, means operated by said trip mechanism for signaling the completion of the predetermined number of revolutions and said slide bar unlocked after said trip mechanism has bee released by said timing segment and forced back to its normal position, thereby unlocking said discharge means.

7. A batchmeter for concrete mixers ooma casing, a shaft therein, and a swinging yoke mounted beneath said shaft, a gear mounted in said yoke and means for a driving the gear from said shaft,a timing seent pivotally mounted in said casing and formed, with a plurality of spaced openings for the 'reception of a timing .pin, a slidable bar extending throughout the easiami ing and beyond the sides thereof and adapted to be forced inwardly, means for retaining the slide bar in its operated posit-ion, a trip block mounted on said slidebar, and a trip arm cooperating with said trip'block to lock said slidable bar after the same is initially operated, means connected to said slide bar for forcing the gear in said swinging yoke into mesh with said timing segment to thereby elevate said segment, a timing pin for insertion in the openings in said timing segment, said pin contacting with said trip mechanism after said timing segment has been raised to a certain height by a predetermined number of revolutions of said shaft, and said trip mechanism when released allowing the slide bar to return to its normal position.

8. In combination with a concrete mixer having a rotary drum, loading and discharging means, a batch meter comprising a casing, worm shaft in said casing and adapted to be drivenby .the drum of the mixer, a slide bar extending through said casing, locking means for the discharging means connected to one end of said slide bar, a timing segment in said casing, an operating mechanism located at the opposite end ofsaid slide bar for forcing said slide bar to its locking position when the materials are elevated by the loading means, means disposed between said timing segment and said trip mechanism for starting the timing segment in action when said slide bar is operated, said slide bar also locking said han dle when operated, means for returning said slide bar to its normal position after said timing segment releases said trip mechanism,

and means to be placed in said timing segment for predetermining the number of revolutions of the drum before said means releases said trip mechanism.

9. In combination with a concrete mlxer having a rotary drum, charging and dischargingvmeans, and a handle for the discharging means, a batch meter comprising a casing, a worm shaft in said casing and driven by the drum of the mixer, a slidable bar within said casing and extending out beyond the sides thereof, means for pushing the bar on the elevation of the loading means, locking means connected with said bar and said discharge handle, a timing segment pivotally mounted so that it will asa sume its normal position by gravity, a yoke and a gear mounted in said yoke, a pinionand gear driven by said worm and adapted to drive the gear in said yoke, said yoke being pivotally mounted beneath the worm, means connected to said yoke and to saidslide bar to force said gear in said yoke into mesh with said timing segment when said slidin haris oted, the movement of said slide ar also l'ochng the discharge handle, a trip mechanism for loehng said slide bar the drum of the mixer and the worm shaft,

in its moved position and said trip mechanism released by said timing segment after a predetermined number of revolutions of and means for returning the slide bar to its normal position to thereby unlock the discharge handle of the mixer.

10. A batchmeter for concrete mixer comprising a casing, a main drive shaft therein, a gear and pinion driven by" said shaft, a swinging yoke mounted below said drive shaft and provided with an intermediate gear therein, a timing segment provided with teeth on its periphery, and normally out of contact with the intermediate gear, a trip mechanism extending above the timing segment, a slidable bar provided with a trip block, the trip mechanism normally resting on said trip block, spring means connecting the swinging yoke and said slidable bar, 'a collar on said slidable bar and a spring contacting with said collar for keeping the spring on said slidable bar under compression, said trip mechanism dropping below said trip block when said slidable bar is operated, means adjustable in said timing segment for contacting and raising said trip mechanism, after said slidable bar is operated and the intermediate gear is thrown in mesh with said timing segment and said trip mechanism releasing said slidable bar after said timing segment has been raised by the predewrmined revolutions of said drive shaft, the return of the slidable bar permitting the timing segment and the swinging yoke to assume their normal positions.

11., In combination with a concrete mixer having a rotary drum, loading and discharging means, the latter being provided with a handle, a batchmeter comprising a casing, a drive shaft in said casing, a pivotal timing segment, means normally out of cont-act with said timing segment and driven by said drive shaft, means having a lock at one end adapted to lock the handle of the'olischarge of the mixer, said means connected to the means normally out of contact with said timing segment, means for operating the means with the look at one end, and operated when said loading means is elevated to thereby throw said timing segment into cooperation with the means that are normally out of contact therewith, to thereby operate said locking means, and a tripping means operated by said timing segment after a predetermined number of revolutions of said mixer drum to allow said means with the look at one end to unlock the discharge handle and permit the timing segment and themeans normally out of contact with said timing segment to return to their normal positions.

12. A batchmeter comprising a casing, a main drive shaft therein, a slidable bar therein, a timing segment therein, and a tripping mechanism, said tripping mechanism connected to'said slidable bar and to be swung into and out of engagement with said timing segment on the operation of said slidable bar and said timing segment operating said tripping mechanism andreleasing said bar at apredetermined number of revolutions of the main shaft.

13. A batchmeter comprising a casing, a main operating shaft, a slidable bar located. beneath said shaft, a timing segment in said casing, and a tripping mechanism controlling said slidable bar, means driven by said main shaft to be swung into engagement with said timing segment for lifting the same and the tripping mechanism after a predetermined number of revolutions of said main shaft to thereby permit said slidable bar to return to its normal position,

14%. A batchmeter comprising a casing and a main driving shaft therein, a slidable bar in said casing, a tripping mechanism controlling said slidable bar, a timing segment, operating means revolved by said driving shaft and pivotal means connected to said last mentioned means to be swung into and out of engagement with said timing segment and said pivotal means being connected to said slidable bar, s'aid tripping mechanism operated by said timing segment after a predetermined number of revolutions of said main driving shaft and said slidable bar returned to its normal position when said tripping mechanism is released and said pivotal means thereby. swung out of contact with said timing segment.

15. A batchmeter comprising a casing, a main driving shaft therein, a timing mgment, a tripping mechanism, a slidable bar and pivotal means to be swung into engagement with said timing segment and operated wholly by said slidable bar, said pivotal means having a rotary member thereon driven by the main shaft and said timing segment operating the tripping mechanism at a predetermined number of revolutions of said main shaft and allowing said slidable bar to return to its normal position and allowing said timing segment to drop.

In testimony whereof I aflix my signature.

CHARLES E. F'OOTE. 

